|Publication number||US5104643 A|
|Application number||US 07/431,027|
|Publication date||14 Apr 1992|
|Filing date||2 Nov 1989|
|Priority date||4 Nov 1988|
|Also published as||CA2001995A1, CA2001995C, DE68902915D1, DE68902915T2, EP0378014A1, EP0378014B1|
|Publication number||07431027, 431027, US 5104643 A, US 5104643A, US-A-5104643, US5104643 A, US5104643A|
|Inventors||Jean F. Grollier, Alain Caudet|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (15), Referenced by (53), Classifications (25), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to new compositions intended for shaving of the skin, based on polyorganosiloxanes containing a hydroxyalkyl group, and to a process for using them.
Some polyorganosiloxanes are well known in the field of shaving compositions, and are used in formulations for shaving creams, pre-shave lotions and shaving foams. They are chiefly volatile silicones such as polydimethylsiloxane or "dimethicone", or polydimethylcyclosiloxane or "cyclomethicone".
These silicones, used in shaving compositions, have the function of alleviating shaving rash as a result of their lubricating power, of making the skin softer and more satiny and of making the compositions containing them rather agreeable to use.
However, these silicones are also known for their antifoam property, and are difficult to use in shaving foams packaged as aerosols. When these silicones permit foam formation, the foam generally varies greatly in quality and stability according to the extent of filling of the aerosol container.
Applicants discovered, surprisingly, that the use of polyorganosiloxanes containing hydroxyalkyl group in shaving compositions enabled a substantial improvement to be obtained in the smoothness and softness of these compositions, in addition to the properties stated above for silicones.
Applicants also discovered that the use of these polyorganosiloxanes containing a hydroxyalkyl group in shaving foams enabled the latter to preserve their quality during the gradual emptying of the aerosol container.
Finally, Applicants discovered that compositions according to the invention, containing polyorganosiloxanes containing a hydroxyalkyl group, improved the cutting of the hairs during shaving, were removed very readily from both the skin and razor blades on rinsing with water, and rapidly left the skin clean and satiny.
A subject of the invention consists of the compositions intended for shaving of the skin, containing polyorganosiloxanes containing a hydroxyalkyl group.
The subject of the invention is also a process for shaving the skin employing these compositions.
Other subjects of the invention will become apparent on reading the description and the examples which follow.
The subject of the present invention is hence a composition intended for shaving of the skin, containing, in a cosmetically acceptable medium, a foaming agent and at least one polyorganosiloxane containing a hydroxyalkyl group, corresponding to the following formula (I): ##STR2## in which: the radicals R, which may be identical or different, are selected from methyl and phenyl radicals, at least 60 mol% of the radicals R being methyl radicals;
the radical R' is a divalent linear or branched alkylene group of the hydrocarbon type containing from 2 to 18 carbon atoms;
p is an integer between 1 and 30 inclusive, and preferably between 1 and 20 inclusive; and
q is an integer between 1 and 150 inclusive.
The copolymer according to the invention can be an alternating or random copolymer.
Among especially preferred compounds used according to the invention, compounds of formula (I) in which:
R' denotes a divalent linear or branched alkylene group of the hydrocarbon type containing 2 to 6 carbon atoms, and more especially a trimethylene chain, --CH2)3, or a 2-methyltrimethylene group, ##STR3## may be used.
Among the products of formula (I), it is preferable to use products whose number average molecular mass is between 600 and 10,000.
Preferred products of formula (I) are represented by the products of number average molecular mass between 1,000 and 10,000 for which p is between 1 and 5 and q is between 10 and 120.
Still more especially, products of formula (I) of molecular mass between 8,000 and 10,000 for which p is between 1 and 3 and q between 100 and 120, and among these the compounds of formula (I) in which R denotes a methyl radical and R' denotes a trimethylene radical --(CH2)3 --, are preferred.
The products of formula (I) are known per se, and may be prepared according to known processes of the prior art, such as those described in French Patent No. 85/16,334 and U.S. Pat. Nos. 2,970,150 and 4,160,775.
To prepare the products of formula (I), it is possible, for example, to use as starting organopolysiloxanes the copolymer of formula (II): ##STR4## in which R, p and q have the meaning given above.
The products of formula (II) are well known in the silicone industry and are generally available on the market. They are, for example, described in U.S. Pat. Nos. 3,220,942, 3,341,111 and 3,436,366.
The products of formula (II) are reacted with an alkenically unsaturated alcohol of formula (III):
in which R" is a linear or branched alkenyl radical having from 2 to 18 carbon atoms.
Among these alcohols, allyl alcohol and methallyl alcohol are used more especially.
As a hydrosilylation catalyst for reacting the unsaturated alcohols of formula (III) with the hydrogenopolysiloxane of formula (II), it is possible to use known hydrosilylation catalysts, in particular the platinum complexes described in U.S. Pat. Nos. 3,715,334, 3,775,452 and 3,814,730; and the platinum/olefin complexes described in U.S. Pat. Nos. 3,159,601 and 3,159,662.
The cosmetically acceptable medium according to the present invention is an aqueous medium containing at least one foaming agent.
The foaming agent according to the present invention is selected from foaming synthetic anionic surfactants, or soaps consisting of C8 -C20 fatty acids neutralized with an alkaline agent such as triethanolamine, potassium hydroxide, sodium hydroxide or mixtures thereof.
The anionic surfactants used according to the present invention are preferably selected from alkali metal and ammonium salts of N-acylglutamic, alkylisethionic, alkylsulphosuccinic and alkylsulphoacetic acids, of N-acylsarcosine and of N-acyl-N-methyltaurine, the alkyl and acyl radicals containing 14 to 22 carbon atoms.
The fatty acids used according to the present invention preferably consist of mixtures of C16 -C20 fatty acids and C8 -C20 fatty acids, and in particular mixtures of stearic acid and coconut fatty acid or of stearic acid and myristic acid or alternatively of stearic acid and lauric acid.
The proportion in soap of C16 -C20 fatty acids is between 40 and 90%, and preferably between 75 and 90%, by weight relative to the total weight of the quantity of soap; and that in soap of C8 -C20 fatty acids from 10 to 60%, and preferably from 10 to 25%, by weight relative to the total weight of the quantity of soap.
Other foaming agents may be used in combination with the fatty acid soaps or the foaming anionic surfactants defined above, such as, for example, nonionic, amphoteric or anionic surfactant agents different from those mentioned above, or polymers such as polyvinyl alcohol.
Preferred compositions according to the invention contain from 10 to 85% by weight of water, and from 0.5 to 80% by weight of soap consisting of C8 -C20 fatty acids neutralized with an alkaline agent or anionic surfactants as defined above.
The compositions for shaving the skin according to the invention contain, in the cosmetically acceptable medium defined above, a polyorganosiloxane containing a hydroxyalkyl group of the formula (I) in concentrations of between 0.2 and 3% by weight, and preferably between 0.5 and 2% by weight, relative to the total weight of the composition.
These compositions may be presented in the form of creams, gels, self-foaming gels, solid soaps and aerosol foams.
The shaving compositions according to the invention may be packaged as aerosols and distributed in the form of foams or self-foaming gels.
In this case, the composition is used in the presence of a propellent gas, selected from volatile hydrocarbons such as n-butane, isobutane and propane, of which a ternary mixture of n-butane, isobutane and propane sold, for example, by the company ELF AQUITAINE under the name AEROGAZ 3,2 N is preferred more especially, or partially or completely fluorinated hydrocarbons including, more especially, monofluorotrichloromethane, dichlorodifluoromethane (F12) and 1,2-dichloro-1,1,2,2-tetrafluoroethane (F114), used alone or in combination; chlorinated and/or fluorinated hydrocarbons of this type are sold under the name of Freon or Dymel by the company DU PONT DE NEMOURS. It is also possible to use as a propellant mixtures of these volatile hydrocarbons with chlorinated and/or fluorinated hydrocarbons, such as, for example, a mixture of n-butane, isobutane, propane and monofluorotrichloromethane, or propellants such as nitrous oxide, carbon dioxide or dimethyl ether.
More especially preferred shaving compositions according to the invention are represented by aerosol foams containing from 75 to 85% by weight of water, from 0.5 to 15% by weight of soap or anionic surfactant as described above, from 0.2 to 3% by weight of a polyorganosiloxane of formula (I), in which R' denotes --CH2)3, of number average molecular mass between 8,000 and 10,000 and for which p is between 1 and 3 and q between 100 and 120, and from 2 to 15%, and more especially from 3 to 10%, by weight of a propellant agent.
The compositions according to the invention can contain, in addition to the polyorganosiloxane of formula (I), adjuvants customarily used in the field of shaving compositions, such as moisturizing agents selected from sorbitol and glycerol, transparency agents also playing the part of solvents, such as glycols, for example propylene glycol or ethylene glycol, film-forming agents, emollients such as, for example, lanolin derivatives or cationic polymers or polyethylene glycols, skin treatment agents such as antiacne and antiseborrhoeic agents, mineral oils, fatty alcohols, polymers, thickeners, stabilizing agents such as, for example, ethanolamides, soothing agents such as allantoin, camphor and methanol, anionic surfactants other than soaps or those defined above, nonionic or amphoteric surfactants or mixtures thereof, colourings, preservatives, antioxidants and fragrances.
The process for shaving the skin according to the present invention consists essentially in applying a composition as defined above to the skin, in shaving the latter by means of a mechanical razor and in following this by rinsing with water.
The examples which follow are designed to give a better illustration of the invention without, however, limiting the latter.
An aerosol shaving foam of the following composition is prepared:
______________________________________Stearic acid 8.0 gCoconut fatty acid 1.0 gPotassium hydroxide 0.5 gTriethanolamine 3.0 gPolysiloxane of formula: 1.0 g ##STR5##(Mn ≈ 9,000)Glycerol 4.0 gIsopropanolamine salts of myristic acid, 2.0 gsold under the name LANAMINE by thecompany AMERCHOLPolyoxyethyleneated sorbitan monolaurate 0.5 gcontaining 20 moles of ethylene oxide,sold under the name TWEEN 20 by thecompany ATLASFragrance qsWater qs 100.0 gAerosol packaging:Above composition 96.0 gPropellant: 4.0 gTernary mixture of n-butane, isobutane >55%and propane, sold under the name AEROGAZ 3,2 Nby the company ELF AQUITAINETotal 100.0 g______________________________________
An aerosol shaving foam of the following composition is prepared:
______________________________________Stearic acid 5.5 gMyristic acid 1.2 gPotassium hydroxide 0.4 gTriethanolamine 3.3 gGlycerol 2.5 gPolysiloxane of formula: 1.0 g ##STR6##(Mn ≈ 9,000)Lanolic acid 0.5 gAmphoteric surfactant known as 0.2 g AS"Cocoamphocarboxyglycinate"(CTFA, 3rd edition, 1982), sold under the nameMIRANOL C2M Conc by the companyMIRANOL, in aqueous solution containing 38%of active substanceDimethyldiallylammonium/acrylamide copoly- 0.25 g ASmer, sold by the company MERCK in aqueoussolution containing 8% of active substance (AS)under the name MERQUAT SFragrance qsWater qs 100.0 gAerosol packaging:Above composition 92.0 gPropellant: Freons 12/114 (53:47) 8.0 gTotal 100.0 g______________________________________
A self-foaming shaving gel of the following composition is prepared:
______________________________________Stearic acid 5.0 gPalmitic acid 5.0 gTriethanolamine 5.5 gPolysiloxane of formula: 0.5 g ##STR7##(Mn ≈ 9,000)Polyethylene glycol, sold by the 0.55 gcompany UNION CARBIDE under the namePOLYOX WSR 205Polyethylene glycol ether (20 EO) of 2.0 goleyl alcohol, sold by the company ICIAMERICAS under the name BRIJ 98Hydroxyethylcellulose, sold by the companyUNION CARBIDE under the name CELLOSIZEPCG 10 1.4 gSorbitol 1.0 gFragrance, colouring qsWater 100 g______________________________________
96 g of this composition are introduced into the central part of a double-walled aerosol can, the inner wall of which consists of an impermeable compressible membrane separating the propellant (outer jacket) from the self-foaming gelled composition (central part).
4 g of an isopentane/Freon 114 mixture (60:40) are then introduced into the central part. After the valve is fitted, the aerosol can is pressurized by introducing 10% of a ternary mixture of n-butane, isobutane>55% and propane, sold under the name AEROGAZ 3,2 N by the company ELF AQUITAINE, into the jacket.
When applied to the skin, this gel develops a foam very rapidly.
A shaving cream of the following composition is prepared:
______________________________________Stearic acid 34.0 gCoconut fatty acid 8.5 gPotassium hydroxide 7.5 gSodium hydroxide 0.75 gGlycerol 13.5 gPolysiloxane of formula: 2.0 g ##STR8##(Mn ≈ 9,000)Antioxidant, fragrance qsWater qs 100.0 g______________________________________
A shaving foam of the following composition is prepared:
______________________________________Sodium N-methyloleyltaurinate, sold by 4.8 g ASthe company GAF under the name FENOPONTK 42 at a concentration of 32% AS(active substance)Sodium lauryl ether sulphate containing 2.1 g AS70% ASSorbitol containing 70% AS 5.6 g ASLanolic acid 0.5 gPolyoxyethylenated sorbitan monolaurate 0.5 gcontaining 20 moles of ethylene oxide,sold by the company ATLAS under thename TWEEN 20Dimethyldiallylammonium chloride/ 0.08 g ASacrylamide copolymer, sold by the companyGAF in aqueous solution containing 8% ASunder the name MERQUAT SPolysiloxane of formula: 2.0 g ##STR9##(Mn ≈ 9,000)Hydroxyethylcellulose, sold by the 1.5 gcompany UNION CARBIDE under the nameCELLOSIZE PCG 10D-Panthenol, in solution containing 50% AS 0.375 g ASColouring, fragrance qsWater qs 100.0 g Aerosol packaging:Above composition 94.0 gPropellant: Isobutane 6.0 gTotal 100.0 g______________________________________
A shaving foam of the following composition is prepared:
______________________________________Monosodium salt of N-acylglutamic acid 4.0 gof formula: ##STR10##where R is a mixture of tallow fattyacid-derived C14 -C22 hydrogenated alkyland/or alkenyl radicals, sold under the nameACYLGLUTAMATE HS 11 by the companyAJINOMOTODisodium salt of N-acylglutamic acid of 3.0 gthe above formula, sold under the nameACYLGLUTAMATE HS 21 by the companyAJINOMOTOGlycerol 3.0 gLanolic acid 1.0 gAmphoteric surfactant known as 0.38 g AS"Cocoamphocarboxyglycinate" (CTFA, 3rdedition, 1982) sold under the nameMIRANOL C2M Conc by the companyMIRANOL, in aqueous solution containing 38%of active substance (AS)Hydroxyethylcellulose, sold by the 1.0 gcompany UNION CARBIDE under the nameCELLOSIZE PCG 10Polyethylene glycol, sold by the company 0.5 gUNION CARBIDE under the name POLYOXWSR 205Polyethylene glycol, sold by the company 0.05 gUNION CARBIDE under the name POLYOXCOAGULANTPolysiloxane of formula: 1.0 g ##STR11##(Mn ≈ 9,000)Fragrance qsWater qs 100.0 gAerosol packaging:Above composition 96.0 gPropellant: Ternary mixture of n-butane, 4.0 gisobutane >55% and propane, sold by thecompany ELF AQUITAINE under the nameAEROGAZ 3,2 NTOTAL 100.0 g______________________________________
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|U.S. Classification||424/47, 424/70.21, 424/70.22, 424/70.12, 424/73, 514/778, 514/63, 424/70.31|
|International Classification||A61K8/00, A61Q9/02, A61K8/72, C08L83/06, A61K8/34, A61K8/36, A61K8/58, A61K8/44, A61K8/55, A61K8/46, C11D9/36, A61K8/892, A61K8/89|
|Cooperative Classification||A61K8/892, A61Q9/02|
|European Classification||A61Q9/02, A61K8/892|
|18 Dec 1989||AS||Assignment|
Owner name: L OREAL, 14 RUE ROYALE, FRANCE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:GROLLIER, JEAN F.;CAUDET, ALAIN;REEL/FRAME:005197/0773
Effective date: 19891030
|23 Sep 1995||FPAY||Fee payment|
Year of fee payment: 4
|4 Oct 1999||FPAY||Fee payment|
Year of fee payment: 8
|15 Sep 2003||FPAY||Fee payment|
Year of fee payment: 12